"But here’s the most important thing," de Blasio said on WCBS 880. "People need to understand, regardless, of what it feels like today it’s going to be a full blown blizzard in the morning. If you don’t need to be in a car, don’t take the car. If you can take mass transit or avoid moving around, do that, please for your own sake and for safety and to keep the roads clear for the Sanitation Department to do the plowing.

"So, we’re poised and ready but we are hearing now from the National Weather Service, at the peak in the early morning hours, meaning – the rush hour time I should say – at the peak this could be two inches or even three inches of snow per hour which is an extraordinarily fast accumulation."

Code Blue is also in effect, de Blasio tweeted. If you see anyone in need of shelter, call 311.